Acupuncture is a complementary medical practice that entails stimulating certain points on the body, most often with a needle penetrating the skin, to alleviate pain or to help treat various health conditions. Traditional oriental medicine explains that health is the result of a harmonious balance of the complementary extremes of yin and yang of the life force known as QI. Qi is said to flow through meridians (pathways) in the human body. Through 350 acupuncture points in the body, these meridians and energy flows may be accessed. Illness is said to be the consequence of an imbalance of the forces. If needles are inserted into these points with appropriate combinations it is said that the energy flow can be brought back into proper balance. In Western societies and several other parts of the world, acupuncture is explained including concepts of neuroscience. Acupuncture points are seen by Western practitioners as places where nerves, muscles and connective tissue can be stimulated. Acupuncture practitioners say that the stimulation increases blood flow while at the same time triggering the activity of our own body's natural painkillers. Orient for almost 4,000 years. In the late 20 century, acupuncture began to spread rapidly in Europe and North America, and started to grow a high acceptance and popularity amongst the general public in the western world.